var oApp = document.getElementById("app");
var aLi = oApp.children;
for(var i=0;i<aLi.length;i++){
	aLi[i].onmouseover=function(){
		for(var j=0;j<aLi.length;j++){
			aLi[j].getElementsByTagName("div")[0].style.display="none";
			aLi[j].firstChild.className="";
			aLi[j].firstChild.className="selected";
		}
			this.getElementsByTagName("div")[0].style.display="block";
	}
	aLi[i].onmouseout=function(){
		for(var j=0;j<aLi.length;j++){
			aLi[j].getElementsByTagName("div")[0].style.display="none";
		}
			
	}
}

